Phase Equilibrium Involving Xylose, Water, and Ethylene Glycol or 1,2-Propylene Glycol at Different Temperatures

Abstract

Xylose is an important molecule that can be used in the production of chemicals such as ethylene glycol and 1,2-propylene glycol. Experimental and theoretical information are fundamental for the development of conversion and separation processes. For the supply of solubility data, this work sought to study solid−liquid equilibrium of xylose in binary liquid solutions formed by water/ethylene glycol and water/1,2-propylene glycol in the temperature range between 293.15 and 323.15 K, covering the entire molar composition range of the binary solution. The Jouyban−Acree and NRTL models were applied in the correlation of experimental data, and the UNIFAC and ASOG models were applied in the prediction of experimental data. Xylose showed solubility in the pure components following the order water > ethylene glycol > 1,2-propylene glycol. Intermediate values of solubility are related to intermediate concentrations of the binary liquid mixture. The mathematical models were successfully applied, and new parameters of UNIFAC and ASOG are presented.

Liquid–Liquid Equilibrium Measurement and Thermodynamic Modeling of the {Sterculia striata Biodiesel + Glycerol + Ethanol} System

“…Activity coefficients are calculated by the ASOG and NRTL models. ASOG , and NRTL models are very widely used to perform thermodynamic modeling and have already been tested in previous studies, ,, with excellent results, in the different types of equilibrium phases.…”